v3.20.4
DERIVATIVES AND FAIR VALUE MEASUREMENTS Table 3 (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Fair value, long-term debt $ 3,799,378 $ 3,442,001
Long-term debt, including current portion and excluding finance leases $ 3,539,258 $ 3,331,839